Ambridge Water Auth, PA
Lead detected, under the action levels
Latest 90th-percentile lead: 9.3 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Ambridge Water Auth at a glance
Ambridge Water Auth serves about 19,500 people through 7,578 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Beaver County, Pennsylvania. EPA system ID: PA5040008; phone on file: 724-266-1145. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 1.43 ppb from 10.73 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Ambridge Water Auth is 10.73 ppb across 9 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 9.3 ppb |
| 2024 | 10.73 ppb over 10 |
| 2023 | 3.9 ppb |
| 2022 | 6.67 ppb |
| 2021 | 6.2 ppb |
| 2021 | 3.2 ppb |
| 2019 | 6.4 ppb |
| 2018 | 5 ppb |
| 2016 | 8 ppb |
How Ambridge Water Auth compares
Of the 516 Pennsylvania systems with a lead result, the median latest reading is 2 ppb; 143 are over 15 ppb right now and 156 have gone over at some point. Ambridge Water Auth's 9.3 ppb sits at the 71st percentile in Pennsylvania and the 97th nationally (higher means more lead).
Neighbouring systems
21 other systems share Beaver County; 3 of them have a higher latest lead result than Ambridge Water Auth. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Beaver Falls Muni Auth | 49,500 | 1.3 ppb |
| Center Twp Water Auth | 19,000 | 1.38 ppb |
| Mun Water Auth Of Aliquippa | 15,685 | 33.5 ppb |
| Creswell Heights Jt Auth | 15,000 | 0 (not detected) |
| Brighton Twp Muni Auth | 7,920 | 0 (not detected) |
| Monaca Boro Water Dept | 6,500 | 3.36 ppb |
| Beaver Boro Muni Auth | 5,799 | 2.6 ppb |
| North Sewickley Mun Water Auth | 4,578 | 3.7 ppb |
| New Sewickley Twp Muni Auth | 4,276 | 1.35 ppb |
| Baden Boro Water Dept | 3,948 | 0 (not detected) |
Next steps for Ambridge, PA
Test your own tap with a certified lab first-draw sample; Ambridge, PA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Ambridge Water Auth whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.